2 * Copyright (C) 2011-2014 Felix Fietkau <nbd@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
16 #include "libubus-internal.h"
18 struct ubus_pending_data {
19 struct list_head list;
21 struct blob_attr data[];
24 static void req_data_cb(struct ubus_request *req, int type, struct blob_attr *data)
26 struct blob_attr **attr;
29 req->raw_data_cb(req, type, data);
34 attr = ubus_parse_msg(data);
35 req->data_cb(req, type, attr[UBUS_ATTR_DATA]);
38 static void __ubus_process_req_data(struct ubus_request *req)
40 struct ubus_pending_data *data;
42 while (!list_empty(&req->pending)) {
43 data = list_first_entry(&req->pending,
44 struct ubus_pending_data, list);
45 list_del(&data->list);
47 req_data_cb(req, data->type, data->data);
52 int __hidden __ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
53 struct blob_attr *msg, int cmd, uint32_t peer)
56 if (msg && blob_pad_len(msg) > UBUS_MAX_MSGLEN)
59 INIT_LIST_HEAD(&req->list);
60 INIT_LIST_HEAD(&req->pending);
63 req->seq = ++ctx->request_seq;
65 return ubus_send_msg(ctx, req->seq, msg, cmd, peer, req->fd);
68 int __hidden ubus_start_request(struct ubus_context *ctx, struct ubus_request *req,
69 struct blob_attr *msg, int cmd, uint32_t peer)
71 memset(req, 0, sizeof(*req));
75 return __ubus_start_request(ctx, req, msg, cmd, peer);
79 void ubus_abort_request(struct ubus_context *ctx, struct ubus_request *req)
81 if (list_empty(&req->list))
84 req->cancelled = true;
85 __ubus_process_req_data(req);
86 list_del_init(&req->list);
89 void ubus_complete_request_async(struct ubus_context *ctx, struct ubus_request *req)
91 if (!list_empty(&req->list))
94 list_add(&req->list, &ctx->requests);
98 ubus_req_complete_cb(struct ubus_request *req)
100 ubus_complete_handler_t cb = req->complete_cb;
105 req->complete_cb = NULL;
106 cb(req, req->status_code);
110 ubus_set_req_status(struct ubus_request *req, int ret)
112 if (!list_empty(&req->list))
113 list_del_init(&req->list);
115 req->status_msg = true;
116 req->status_code = ret;
118 ubus_req_complete_cb(req);
121 static void ubus_sync_req_cb(struct ubus_request *req, int ret)
123 req->status_msg = true;
124 req->status_code = ret;
128 static int64_t get_time_msec(void)
133 clock_gettime(CLOCK_MONOTONIC, &ts);
134 val = (int64_t) ts.tv_sec * 1000LL;
135 val += ts.tv_nsec / 1000000LL;
139 int ubus_complete_request(struct ubus_context *ctx, struct ubus_request *req,
142 ubus_complete_handler_t complete_cb = req->complete_cb;
143 bool registered = ctx->sock.registered;
144 int status = UBUS_STATUS_NO_DATA;
145 int64_t timeout = 0, time_end = 0;
153 time_end = get_time_msec() + req_timeout;
155 ubus_complete_request_async(ctx, req);
156 req->complete_cb = ubus_sync_req_cb;
159 while (!req->status_msg) {
160 bool cancelled = uloop_cancelled;
162 uloop_cancelled = false;
164 timeout = time_end - get_time_msec();
166 ubus_set_req_status(req, UBUS_STATUS_TIMEOUT);
167 uloop_cancelled = cancelled;
171 ubus_poll_data(ctx, (unsigned int) timeout);
173 uloop_cancelled = cancelled;
175 ubus_set_req_status(req, UBUS_STATUS_CONNECTION_FAILED);
180 if (ctx->stack_depth)
181 uloop_cancelled = true;
184 status = req->status_code;
186 req->complete_cb = complete_cb;
187 if (req->complete_cb)
188 req->complete_cb(req, status);
191 uloop_fd_delete(&ctx->sock);
193 if (!ctx->stack_depth)
194 ctx->pending_timer.cb(&ctx->pending_timer);
200 void ubus_complete_deferred_request(struct ubus_context *ctx, struct ubus_request_data *req, int ret)
202 blob_buf_init(&b, 0);
203 blob_put_int32(&b, UBUS_ATTR_STATUS, ret);
204 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
205 ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_STATUS, req->peer, req->fd);
208 int ubus_send_reply(struct ubus_context *ctx, struct ubus_request_data *req,
209 struct blob_attr *msg)
213 blob_buf_init(&b, 0);
214 blob_put_int32(&b, UBUS_ATTR_OBJID, req->object);
215 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
216 ret = ubus_send_msg(ctx, req->seq, b.head, UBUS_MSG_DATA, req->peer, -1);
218 return UBUS_STATUS_NO_DATA;
223 int ubus_invoke_async(struct ubus_context *ctx, uint32_t obj, const char *method,
224 struct blob_attr *msg, struct ubus_request *req)
226 blob_buf_init(&b, 0);
227 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
228 blob_put_string(&b, UBUS_ATTR_METHOD, method);
230 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
232 if (ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
233 return UBUS_STATUS_INVALID_ARGUMENT;
239 int ubus_invoke_async_fd(struct ubus_context *ctx, uint32_t obj, const char *method,
240 struct blob_attr *msg, struct ubus_request *req, int fd)
242 blob_buf_init(&b, 0);
243 blob_put_int32(&b, UBUS_ATTR_OBJID, obj);
244 blob_put_string(&b, UBUS_ATTR_METHOD, method);
246 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
248 memset(req, 0, sizeof(*req));
250 if (__ubus_start_request(ctx, req, b.head, UBUS_MSG_INVOKE, obj) < 0)
251 return UBUS_STATUS_INVALID_ARGUMENT;
255 int ubus_invoke(struct ubus_context *ctx, uint32_t obj, const char *method,
256 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
259 struct ubus_request req;
262 rc = ubus_invoke_async(ctx, obj, method, msg, &req);
268 return ubus_complete_request(ctx, &req, timeout);
271 int ubus_invoke_fd(struct ubus_context *ctx, uint32_t obj, const char *method,
272 struct blob_attr *msg, ubus_data_handler_t cb, void *priv,
275 struct ubus_request req;
278 rc = ubus_invoke_async_fd(ctx, obj, method, msg, &req, fd);
284 return ubus_complete_request(ctx, &req, timeout);
288 ubus_notify_complete_cb(struct ubus_request *req, int ret)
290 struct ubus_notify_request *nreq;
292 nreq = container_of(req, struct ubus_notify_request, req);
293 if (!nreq->complete_cb)
296 nreq->complete_cb(nreq, 0, 0);
300 __ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
301 const char *type, struct blob_attr *msg,
302 struct ubus_notify_request *req, bool reply)
304 memset(req, 0, sizeof(*req));
306 blob_buf_init(&b, 0);
307 blob_put_int32(&b, UBUS_ATTR_OBJID, obj->id);
308 blob_put_string(&b, UBUS_ATTR_METHOD, type);
311 blob_put_int8(&b, UBUS_ATTR_NO_REPLY, true);
314 blob_put(&b, UBUS_ATTR_DATA, blob_data(msg), blob_len(msg));
316 if (ubus_start_request(ctx, &req->req, b.head, UBUS_MSG_NOTIFY, obj->id) < 0)
317 return UBUS_STATUS_INVALID_ARGUMENT;
319 /* wait for status message from ubusd first */
320 req->req.notify = true;
322 req->id[0] = obj->id;
323 req->req.complete_cb = ubus_notify_complete_cb;
328 int ubus_notify_async(struct ubus_context *ctx, struct ubus_object *obj,
329 const char *type, struct blob_attr *msg,
330 struct ubus_notify_request *req)
332 return __ubus_notify_async(ctx, obj, type, msg, req, true);
335 int ubus_notify(struct ubus_context *ctx, struct ubus_object *obj,
336 const char *type, struct blob_attr *msg, int timeout)
338 struct ubus_notify_request req;
341 ret = __ubus_notify_async(ctx, obj, type, msg, &req, timeout >= 0);
346 ubus_abort_request(ctx, &req.req);
350 return ubus_complete_request(ctx, &req.req, timeout);
353 static bool ubus_get_status(struct ubus_msghdr_buf *buf, int *ret)
355 struct blob_attr **attrbuf = ubus_parse_msg(buf->data);
357 if (!attrbuf[UBUS_ATTR_STATUS])
360 *ret = blob_get_u32(attrbuf[UBUS_ATTR_STATUS]);
365 ubus_process_req_status(struct ubus_request *req, struct ubus_msghdr_buf *buf)
367 int ret = UBUS_STATUS_INVALID_ARGUMENT;
369 ubus_get_status(buf, &ret);
370 req->peer = buf->hdr.peer;
371 ubus_set_req_status(req, ret);
377 ubus_process_req_data(struct ubus_request *req, struct ubus_msghdr_buf *buf)
379 struct ubus_pending_data *data;
384 req_data_cb(req, buf->hdr.type, buf->data);
385 __ubus_process_req_data(req);
386 req->blocked = false;
389 ubus_req_complete_cb(req);
394 len = blob_raw_len(buf->data);
395 data = calloc(1, sizeof(*data) + len);
399 data->type = buf->hdr.type;
400 memcpy(data->data, buf->data, len);
401 list_add(&data->list, &req->pending);
405 ubus_find_notify_id(struct ubus_notify_request *n, uint32_t objid)
407 uint32_t pending = n->pending;
410 for (i = 0; pending; i++, pending >>= 1) {
414 if (n->id[i] == objid)
421 static struct ubus_request *
422 ubus_find_request(struct ubus_context *ctx, uint32_t seq, uint32_t peer, int *id)
424 struct ubus_request *req;
426 list_for_each_entry(req, &ctx->requests, list) {
427 struct ubus_notify_request *nreq;
428 nreq = container_of(req, struct ubus_notify_request, req);
437 *id = ubus_find_notify_id(nreq, peer);
440 } else if (peer != req->peer)
448 static void ubus_process_notify_status(struct ubus_request *req, int id, struct ubus_msghdr_buf *buf)
450 struct ubus_notify_request *nreq;
451 struct blob_attr **tb;
452 struct blob_attr *cur;
456 nreq = container_of(req, struct ubus_notify_request, req);
457 nreq->pending &= ~(1 << id);
460 /* first id: ubusd's status message with a list of ids */
461 tb = ubus_parse_msg(buf->data);
462 if (tb[UBUS_ATTR_SUBSCRIBERS]) {
463 blob_for_each_attr(cur, tb[UBUS_ATTR_SUBSCRIBERS], rem) {
464 if (!blob_check_type(blob_data(cur), blob_len(cur), BLOB_ATTR_INT32))
467 nreq->pending |= (1 << idx);
468 nreq->id[idx] = blob_get_int32(cur);
471 if (idx == UBUS_MAX_NOTIFY_PEERS + 1)
476 ubus_get_status(buf, &ret);
478 nreq->status_cb(nreq, id, ret);
482 ubus_set_req_status(req, 0);
485 void __hidden ubus_process_req_msg(struct ubus_context *ctx, struct ubus_msghdr_buf *buf, int fd)
487 struct ubus_msghdr *hdr = &buf->hdr;
488 struct ubus_request *req;
492 case UBUS_MSG_STATUS:
493 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
505 ubus_process_notify_status(req, id, buf);
507 ubus_process_req_status(req, buf);
511 req = ubus_find_request(ctx, hdr->seq, hdr->peer, &id);
512 if (req && (req->data_cb || req->raw_data_cb))
513 ubus_process_req_data(req, buf);
518 int __ubus_monitor(struct ubus_context *ctx, const char *type)
520 blob_buf_init(&b, 0);
521 return ubus_invoke(ctx, UBUS_SYSTEM_OBJECT_MONITOR, type, b.head, NULL, NULL, 1000);